drivers/gpu/drm/via/via_mm.c

   1 /*
   2  * Copyright 2006 Tungsten Graphics Inc., Bismarck, ND., USA.
   3  * All rights reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial portions
  14  * of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24 /*
  25  * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
  26  */
  27
  28 #include <linux/slab.h>
  29
  30 #include <drm/drm_device.h>
  31 #include <drm/drm_file.h>
  32 #include <drm/drm_irq.h>
  33 #include <drm/via_drm.h>
  34
  35 #include "via_drv.h"
  36
  37 #define VIA_MM_ALIGN_SHIFT 4
  38 #define VIA_MM_ALIGN_MASK ((1 << VIA_MM_ALIGN_SHIFT) - 1)
  39
  40 struct via_memblock {
  41         struct drm_mm_node mm_node;
  42         struct list_head owner_list;
  43 };
  44
  45 int via_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
  46 {
  47         drm_via_agp_t *agp = data;
  48         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  49
  50         mutex_lock(&dev->struct_mutex);
  51         drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> VIA_MM_ALIGN_SHIFT);
  52
  53         dev_priv->agp_initialized = 1;
  54         dev_priv->agp_offset = agp->offset;
  55         mutex_unlock(&dev->struct_mutex);
  56
  57         DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
  58         return 0;
  59 }
  60
  61 int via_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
  62 {
  63         drm_via_fb_t *fb = data;
  64         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  65
  66         mutex_lock(&dev->struct_mutex);
  67         drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> VIA_MM_ALIGN_SHIFT);
  68
  69         dev_priv->vram_initialized = 1;
  70         dev_priv->vram_offset = fb->offset;
  71
  72         mutex_unlock(&dev->struct_mutex);
  73         DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
  74
  75         return 0;
  76
  77 }
  78
  79 int via_final_context(struct drm_device *dev, int context)
  80 {
  81         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  82
  83         via_release_futex(dev_priv, context);
  84
  85         /* Linux specific until context tracking code gets ported to BSD */
  86         /* Last context, perform cleanup */
  87         if (list_is_singular(&dev->ctxlist)) {
  88                 DRM_DEBUG("Last Context\n");
  89                 drm_irq_uninstall(dev);
  90                 via_cleanup_futex(dev_priv);
  91                 via_do_cleanup_map(dev);
  92         }
  93         return 1;
  94 }
  95
  96 void via_lastclose(struct drm_device *dev)
  97 {
  98         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  99
 100         if (!dev_priv)
 101                 return;
 102
 103         mutex_lock(&dev->struct_mutex);
 104         if (dev_priv->vram_initialized) {
 105                 drm_mm_takedown(&dev_priv->vram_mm);
 106                 dev_priv->vram_initialized = 0;
 107         }
 108         if (dev_priv->agp_initialized) {
 109                 drm_mm_takedown(&dev_priv->agp_mm);
 110                 dev_priv->agp_initialized = 0;
 111         }
 112         mutex_unlock(&dev->struct_mutex);
 113 }
 114
 115 int via_mem_alloc(struct drm_device *dev, void *data,
 116                   struct drm_file *file)
 117 {
 118         drm_via_mem_t *mem = data;
 119         int retval = 0, user_key;
 120         struct via_memblock *item;
 121         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 122         struct via_file_private *file_priv = file->driver_priv;
 123         unsigned long tmpSize;
 124
 125         if (mem->type > VIA_MEM_AGP) {
 126                 DRM_ERROR("Unknown memory type allocation\n");
 127                 return -EINVAL;
 128         }
 129         mutex_lock(&dev->struct_mutex);
 130         if (0 == ((mem->type == VIA_MEM_VIDEO) ? dev_priv->vram_initialized :
 131                       dev_priv->agp_initialized)) {
 132                 DRM_ERROR
 133                     ("Attempt to allocate from uninitialized memory manager.\n");
 134                 mutex_unlock(&dev->struct_mutex);
 135                 return -EINVAL;
 136         }
 137
 138         item = kzalloc(sizeof(*item), GFP_KERNEL);
 139         if (!item) {
 140                 retval = -ENOMEM;
 141                 goto fail_alloc;
 142         }
 143
 144         tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
 145         if (mem->type == VIA_MEM_AGP)
 146                 retval = drm_mm_insert_node(&dev_priv->agp_mm,
 147                                             &item->mm_node,
 148                                             tmpSize);
 149         else
 150                 retval = drm_mm_insert_node(&dev_priv->vram_mm,
 151                                             &item->mm_node,
 152                                             tmpSize);
 153         if (retval)
 154                 goto fail_alloc;
 155
 156         retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
 157         if (retval < 0)
 158                 goto fail_idr;
 159         user_key = retval;
 160
 161         list_add(&item->owner_list, &file_priv->obj_list);
 162         mutex_unlock(&dev->struct_mutex);
 163
 164         mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
 165                       dev_priv->vram_offset : dev_priv->agp_offset) +
 166             ((item->mm_node.start) << VIA_MM_ALIGN_SHIFT);
 167         mem->index = user_key;
 168
 169         return 0;
 170
 171 fail_idr:
 172         drm_mm_remove_node(&item->mm_node);
 173 fail_alloc:
 174         kfree(item);
 175         mutex_unlock(&dev->struct_mutex);
 176
 177         mem->offset = 0;
 178         mem->size = 0;
 179         mem->index = 0;
 180         DRM_DEBUG("Video memory allocation failed\n");
 181
 182         return retval;
 183 }
 184
 185 int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
 186 {
 187         drm_via_private_t *dev_priv = dev->dev_private;
 188         drm_via_mem_t *mem = data;
 189         struct via_memblock *obj;
 190
 191         mutex_lock(&dev->struct_mutex);
 192         obj = idr_find(&dev_priv->object_idr, mem->index);
 193         if (obj == NULL) {
 194                 mutex_unlock(&dev->struct_mutex);
 195                 return -EINVAL;
 196         }
 197
 198         idr_remove(&dev_priv->object_idr, mem->index);
 199         list_del(&obj->owner_list);
 200         drm_mm_remove_node(&obj->mm_node);
 201         kfree(obj);
 202         mutex_unlock(&dev->struct_mutex);
 203
 204         DRM_DEBUG("free = 0x%lx\n", mem->index);
 205
 206         return 0;
 207 }
 208
 209
 210 void via_reclaim_buffers_locked(struct drm_device *dev,
 211                                 struct drm_file *file)
 212 {
 213         struct via_file_private *file_priv = file->driver_priv;
 214         struct via_memblock *entry, *next;
 215
 216         if (!(dev->master && file->master->lock.hw_lock))
 217                 return;
 218
 219         drm_legacy_idlelock_take(&file->master->lock);
 220
 221         mutex_lock(&dev->struct_mutex);
 222         if (list_empty(&file_priv->obj_list)) {
 223                 mutex_unlock(&dev->struct_mutex);
 224                 drm_legacy_idlelock_release(&file->master->lock);
 225
 226                 return;
 227         }
 228
 229         via_driver_dma_quiescent(dev);
 230
 231         list_for_each_entry_safe(entry, next, &file_priv->obj_list,
 232                                  owner_list) {
 233                 list_del(&entry->owner_list);
 234                 drm_mm_remove_node(&entry->mm_node);
 235                 kfree(entry);
 236         }
 237         mutex_unlock(&dev->struct_mutex);
 238
 239         drm_legacy_idlelock_release(&file->master->lock);
 240
 241         return;
 242 }